Inflatable booster cushion



FIG. 1 is a perspective view of the inflatable booster cushion of the present invention;

FIG. 2 is a second perspective view of the inflatable booster cushion of the present invention;

FIG. 3 is a side elevation view of the inflatable booster cushion of FIG. 1; and,

FIG. 4 is a top plan view of the inflatable booster cushion of FIG. 1.

In the drawings, the broken lines represent portions of the inflatable booster cushion that form no part of the claimed design. 

The ornamental design for the inflatable booster cushion, as shown and described. 